public class TwoSum {
    public int[] twoSum(int[] nums, int target) {
        for(int i = 0; i < nums.length; i++) {
            for(int j = i + 1; j < nums.length; j++) {
                if(nums[i] + nums[j] == target)
                    return new int[] {i, j};
            }
        }
        throw new IllegalArgumentException("No two sum solution");
    }

    public static void main(String[] args) {
        int[] nums = new int[]{2,4,7,5};
        int target = 6;
        int[] result = new TwoSum().twoSum(nums, target);
        System.out.println("[" + result[0] + ", " + result[1] + "]");
    }

}